Phase separation is accompanied by spectral weight loss and first Brillouin zone boundary deformation. Such an instability is observed in square structures and it is absent in honeycomb lattices. To our knowledge, no previous publications have revealed relationship between a Fermi surface instability and...
The honeycomb lattice possesses a novel energy band structure, which is characterized by two distinct Dirac points in the Brillouin zone, dominating most of the physical properties of the honeycomb structure materials. However, up till now, the origin of the Dirac points is unclear yet. Here, we...
point and dinouebnleergDyirsaacmceonasesthaopspeealirst[esdeeinFiEg.q 2. ((d3))].,Fwohr itc1h =a tr0e, the d and p bands become equivalent to the ones at K and K′ points in the unfolded Brillouin zone of honeycomb lattice with the rhombic unit cell of two ...
The ground state and single particle excitation spectrum of a Bernal stacking (AB stacking) bilayer honeycomb lattice t−J model is studied with a slave boson mean field theory. Magnetism, chiral-d wave superconductivity, and interlayer phase separation are considered. We find Bogoliubov Fermi surf...
Gray lines indicate high symmetry directions of the Brillouin zone. Wave vector transfers are shown in the reciprocal space of the monoclinic lattice in reciprocal lattice units for (a)–(g) and projected into a hexagonal lattice in (h)–(i). Data in (a)–(c) and (g) have been ...
The exact diagonalization results were produced using the library ARPACK49, primarily on an N = 24 site cluster with the full point group symmetry of the honeycomb lattice, and containing all the high-symmetry points of the Brillouin zone. Additional calculations were done on system sizes ran...
27 May 2016 Topological triple-vortex lattice stabilized by mixed frustration in expanded honeycomb Kitaev- Heisenberg model Xiaoyan Yao & Shuai Dong The expanded classical Kitaev-Heisenberg model on a honeycomb lattice is investigated with the next-nearest-neighboring Heisenberg interaction considered....
Fig. 2. (a) The honeycomb lattice structure of graphene with two atoms, A and B, per unit cell. a1 and a2 are the lattice vectors and a = 1.42 Å is the in-plane nearest-neighbor distance. (b) Brillouin zone of graphene with representation of Dirac cones near the K and K’ poin...
the ions were arranged in a planar, honeycomb lattice to keep the spatial inversion symmetry and a periodic local magnetic-flux density normal to the 2D plane was added to the lattice to break the time-reversal invariance. Today we know that the lattice with the spatial inversion symmetry in ...
Hu: Reconfigurable topological waveguide 3453 Figure 2: (a) Band structure for conventional honeycomb lattice. (b) The first Brillouin zone, where b1 and b2 are unit vectors in the reciprocal space, and a vector in the reciprocal space is expressed as k k1b1 + k2b2. (c), (e), (g) ...